Species flower of an hour
saucer-like, white flower with yellow stamens, gray-green stems, and gray-green leaves with serrated margins

flower of an hour

Hibiscus trionum

The Flower of an Hour, or Hibiscus trionum, is a beautiful annual plant species native to Europe and Asia. It grows in sunny areas with damp soils and flowers from late spring to summer. The Flower of an Hour is a hardy garden plant, with a unique white-petaled flower that fades into a pale pinkish hue as the day progresses and then quickly disappears. It’s an attractive addition to any garden and despite its short life, a bit of magic as the flower fades away.

Cycle:

Annual

Watering:

Average

Propagation:

Seed Propagation,Division,Cutting,Layering Propagation

Hardiness Zone:

2 - 11

Flowers:

White to pale yellow with dark centers Flowers

Sun:

full sun

Leaf:

Yes

Leaf Color:

green

Growth Rate:

High

Maintenance:

Low

Drought Tolerant:

Yes

Salt Tolerant:

Yes

Invasive:

Yes

Tropical:

Yes

watering

For a Flower of an Hour, it is important to provide regular but limited amounts of water. The best schedule for watering would be once a week, providing enough water to keep the soil moist but not soggy; approximately 1/2 to 1 cup of water per plant should be enough. To ensure that the soil does not become too dry, it is important to check it regularly and adjust the amount of water accordingly. Try to water the plant in the morning or early afternoon so that the soil has time to absorb the moisture and all of the leaves can dry before nightfall.

sunlight

Hibiscus trionum, also known as the Flower of an Hour, is a tropical plant that thrives best in an environment with direct sunlight. It will need a minimum of 5 to 6 hours of direct sun daily; however, it will tolerate more than 8 hours of sunlight per day. In order to maintain healthy growth, Hibiscus trionum should be placed in a location that receives full sun during the morning and afternoon hours. Avoid excessive midday sun exposure, as too much sunlight can cause heat stress and dry out the plant.

pruning

Flower of an Hour (Hibiscus trionum) should be pruned twice a year, in spring and fall. Pruning in spring should involve cutting off any dead or diseased shoots and removing any dead blooms. This should be done with sharp pruning shears or a clean pair of scissors. In late fall, just before flowers appear to bloom, all shoots can be trimmed back to within 4 to 6 inches of the ground. Doing this will produce a more compact and attractive flowering plant.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Hibiscus trionum typically starts flowering in late spring, usually in May or June.

Starts Flowering

Hibiscus trionum typically starts flowering in late spring, usually in May or June.

Hardiness Map